I just had my pool opened by Anthony and Sylvan (the builders and the only ones who have opened and closed it). All the surfaces were covered with white bumps which felt like sand paper or worse on your feet. Through TPF and talking to the pool company, I determined it's calcium scale (gunnite pool with SWG, 2nd year being opened).
Here's what they told me to do to remove the scale and get the surfaces back to their original smooth condition:
Remove the Polairus, and shut off the pump.
Add 4 gallons Muriatic Acid (30,000 gal pool)
Add 2 quarts "Les Iron"
Brush the walls to mix in the acid.
Continue brushing a few times a day to remove the scale that is loosened by the acid
When the scale is gone (3 days was the prediction) add pH Raise and stabilizer and brush to mix in.
Test ph and adjust until it's good and then turn on the pump
Does this make sense?
Do you think the timeline is right? They said after 2 or 3 days all the scale would be gone.